Steadicam is a brand of camera stabilizing mount for motion picture cameras that mechanically isolates it from the operator's movement, allowing for a smooth shot even when moving quickly over an uneven surface. The Steadicam was invented by cameraman Garrett Brown, and is now a registered trademark of Tiffen.The operator wears a harness — the Steadicam "vest" — which is attached to an iso-elastic arm. This is connected by a multiaxis and ultra-low friction gimbal to the Steadicam armature which has the camera mounted at one end and a counterbalance weight at the other. The counterbalance usually includes the battery pack and a monitor. The monitor substitutes for the camera's viewfinder, since the range of motion of the camera relative to the operator makes the camera's own viewfinder unusable. In the film industry the armature and weight are traditionally called the "sled", as they resembled a sled in an early model of the Steadicam.